Quantum field theory

ID: quantum-field-theory

Quantum Field Theory (QFT) is a fundamental theoretical framework that combines classical field theory, quantum mechanics, and special relativity. It describes how subatomic particles interact and behave as excitations or quanta of underlying fields that permeate space and time. Here are some key concepts: 1. **Fields**: In QFT, every type of particle is associated with a corresponding field. For example, electrons are excitations of the electron field, while photons are excitations of the electromagnetic field.
Quantum field theory by Ciro Santilli 37 Updated +Created
Theoretical framework on which quantum field theories are based, theories based on framework include:so basically the entire Standard Model
The basic idea is that there is a field for each particle particle type.
And then those fields interact with some Lagrangian.
One way to look at QFT is to split it into two parts:
Then interwined with those two is the part "OK, how to solve the equations, if they are solvable at all", which is an open problem: Yang-Mills existence and mass gap.
There appear to be two main equivalent formulations of quantum field theory:
Video 1.
Quantum Field Theory visualized by ScienceClic English (2020)
Source. Gives one piece of possibly OK intuition: quantum theories kind of model all possible evolutions of the system at the same time, but with different probabilities. QFT is no different in that aspect.
Video 2.
Quantum Fields: The Real Building Blocks of the Universe by David Tong (2017)
Source. Boring, does not give anything except the usual blabla everyone knows from Googling:
Video 3.
Quantum Field Theory: What is a particle? by Physics Explained (2021)
Source. Gives some high level analogies between high level principles of non-relativistic quantum mechanics and special relativity in to suggest that there is a minimum quanta of a relativistic quantum field.

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